Python Program to Make a Simple Calculator

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1. # Program make a simple calculator that can add, subtract, multiply and divide using functions
3. # This function adds two numbers
4. def add(x, y):
5. return x + y
7. # This function subtracts two numbers
8. def subtract(x, y):
9. return x - y
11. # This function multiplies two numbers
12. def multiply(x, y):
13. return x * y
15. # This function divides two numbers
16. def divide(x, y):
17. return x / y
19. print("Select operation.")
20. print("1.Add")
21. print("2.Subtract")
22. print("3.Multiply")
23. print("4.Divide")
25. # Take input from the user
26. choice = input("Enter choice(1/2/3/4):")
28. num1 = int(input("Enter first number: "))
29. num2 = int(input("Enter second number: "))
31. if choice == '1':
32. print(num1,"+",num2,"=", add(num1,num2))
34. elif choice == '2':
35. print(num1,"-",num2,"=", subtract(num1,num2))
37. elif choice == '3':
38. print(num1,"*",num2,"=", multiply(num1,num2))
40. elif choice == '4':
41. print(num1,"/",num2,"=", divide(num1,num2))
42. else:
43. print("Invalid input")